733 lines
20 KiB
C
733 lines
20 KiB
C
/*
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* file for managing the edac_device class of devices for EDAC
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*
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* (C) 2007 SoftwareBitMaker(http://www.softwarebitmaker.com)
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* This file may be distributed under the terms of the
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* GNU General Public License.
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*
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* Written Doug Thompson <norsk5@xmission.com>
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*
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*/
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#include <linux/ctype.h>
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#include "edac_core.h"
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#include "edac_module.h"
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#define EDAC_DEVICE_SYMLINK "device"
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#define to_edacdev(k) container_of(k, struct edac_device_ctl_info, kobj)
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#define to_edacdev_attr(a) container_of(a, struct edacdev_attribute, attr)
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/************************** edac_device sysfs code and data **************/
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/*
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* Set of edac_device_ctl_info attribute store/show functions
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*/
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/* 'log_ue' */
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static ssize_t edac_device_ctl_log_ue_show(struct edac_device_ctl_info
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*ctl_info, char *data)
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{
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return sprintf(data, "%u\n", ctl_info->log_ue);
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}
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static ssize_t edac_device_ctl_log_ue_store(struct edac_device_ctl_info
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*ctl_info, const char *data,
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size_t count)
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{
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/* if parameter is zero, turn off flag, if non-zero turn on flag */
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ctl_info->log_ue = (simple_strtoul(data, NULL, 0) != 0);
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return count;
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}
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/* 'log_ce' */
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static ssize_t edac_device_ctl_log_ce_show(struct edac_device_ctl_info
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*ctl_info, char *data)
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{
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return sprintf(data, "%u\n", ctl_info->log_ce);
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}
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static ssize_t edac_device_ctl_log_ce_store(struct edac_device_ctl_info
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*ctl_info, const char *data,
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size_t count)
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{
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/* if parameter is zero, turn off flag, if non-zero turn on flag */
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ctl_info->log_ce = (simple_strtoul(data, NULL, 0) != 0);
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return count;
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}
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/* 'panic_on_ue' */
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static ssize_t edac_device_ctl_panic_on_ue_show(struct edac_device_ctl_info
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*ctl_info, char *data)
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{
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return sprintf(data, "%u\n", ctl_info->panic_on_ue);
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}
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static ssize_t edac_device_ctl_panic_on_ue_store(struct edac_device_ctl_info
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*ctl_info, const char *data,
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size_t count)
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{
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/* if parameter is zero, turn off flag, if non-zero turn on flag */
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ctl_info->panic_on_ue = (simple_strtoul(data, NULL, 0) != 0);
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return count;
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}
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/* 'poll_msec' show and store functions*/
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static ssize_t edac_device_ctl_poll_msec_show(struct edac_device_ctl_info
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*ctl_info, char *data)
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{
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return sprintf(data, "%u\n", ctl_info->poll_msec);
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}
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static ssize_t edac_device_ctl_poll_msec_store(struct edac_device_ctl_info
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*ctl_info, const char *data,
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size_t count)
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{
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unsigned long value;
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/* get the value and enforce that it is non-zero, must be at least
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* one millisecond for the delay period, between scans
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* Then cancel last outstanding delay for the work request
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* and set a new one.
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*/
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value = simple_strtoul(data, NULL, 0);
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edac_device_reset_delay_period(ctl_info, value);
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return count;
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}
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/* edac_device_ctl_info specific attribute structure */
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struct ctl_info_attribute {
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struct attribute attr;
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ssize_t(*show) (struct edac_device_ctl_info *, char *);
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ssize_t(*store) (struct edac_device_ctl_info *, const char *, size_t);
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};
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#define to_ctl_info(k) container_of(k, struct edac_device_ctl_info, kobj)
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#define to_ctl_info_attr(a) container_of(a,struct ctl_info_attribute,attr)
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/* Function to 'show' fields from the edac_dev 'ctl_info' structure */
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static ssize_t edac_dev_ctl_info_show(struct kobject *kobj,
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struct attribute *attr, char *buffer)
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{
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struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj);
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struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr);
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if (ctl_info_attr->show)
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return ctl_info_attr->show(edac_dev, buffer);
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return -EIO;
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}
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/* Function to 'store' fields into the edac_dev 'ctl_info' structure */
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static ssize_t edac_dev_ctl_info_store(struct kobject *kobj,
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struct attribute *attr,
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const char *buffer, size_t count)
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{
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struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj);
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struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr);
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if (ctl_info_attr->store)
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return ctl_info_attr->store(edac_dev, buffer, count);
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return -EIO;
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}
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/* edac_dev file operations for an 'ctl_info' */
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static struct sysfs_ops device_ctl_info_ops = {
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.show = edac_dev_ctl_info_show,
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.store = edac_dev_ctl_info_store
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};
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#define CTL_INFO_ATTR(_name,_mode,_show,_store) \
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static struct ctl_info_attribute attr_ctl_info_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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};
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/* Declare the various ctl_info attributes here and their respective ops */
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CTL_INFO_ATTR(log_ue, S_IRUGO | S_IWUSR,
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edac_device_ctl_log_ue_show, edac_device_ctl_log_ue_store);
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CTL_INFO_ATTR(log_ce, S_IRUGO | S_IWUSR,
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edac_device_ctl_log_ce_show, edac_device_ctl_log_ce_store);
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CTL_INFO_ATTR(panic_on_ue, S_IRUGO | S_IWUSR,
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edac_device_ctl_panic_on_ue_show,
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edac_device_ctl_panic_on_ue_store);
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CTL_INFO_ATTR(poll_msec, S_IRUGO | S_IWUSR,
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edac_device_ctl_poll_msec_show, edac_device_ctl_poll_msec_store);
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/* Base Attributes of the EDAC_DEVICE ECC object */
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static struct ctl_info_attribute *device_ctrl_attr[] = {
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&attr_ctl_info_panic_on_ue,
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&attr_ctl_info_log_ue,
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&attr_ctl_info_log_ce,
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&attr_ctl_info_poll_msec,
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NULL,
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};
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/* Main DEVICE kobject release() function */
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static void edac_device_ctrl_master_release(struct kobject *kobj)
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{
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struct edac_device_ctl_info *edac_dev;
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edac_dev = to_edacdev(kobj);
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debugf1("%s()\n", __func__);
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complete(&edac_dev->kobj_complete);
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}
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static struct kobj_type ktype_device_ctrl = {
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.release = edac_device_ctrl_master_release,
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.sysfs_ops = &device_ctl_info_ops,
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.default_attrs = (struct attribute **)device_ctrl_attr,
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};
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/**************** edac_device main kobj ctor/dtor code *********************/
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/*
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* edac_device_register_main_kobj
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*
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* perform the high level setup for the new edac_device instance
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*
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* Return: 0 SUCCESS
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* !0 FAILURE
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*/
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static int edac_device_register_main_kobj(struct edac_device_ctl_info *edac_dev)
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{
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int err = 0;
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struct sysdev_class *edac_class;
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debugf1("%s()\n", __func__);
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/* get the /sys/devices/system/edac reference */
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edac_class = edac_get_edac_class();
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if (edac_class == NULL) {
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debugf1("%s() no edac_class error=%d\n", __func__, err);
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return err;
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}
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/* Point to the 'edac_class' this instance 'reports' to */
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edac_dev->edac_class = edac_class;
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/* Init the devices's kobject */
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memset(&edac_dev->kobj, 0, sizeof(struct kobject));
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edac_dev->kobj.ktype = &ktype_device_ctrl;
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/* set this new device under the edac_class kobject */
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edac_dev->kobj.parent = &edac_class->kset.kobj;
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/* generate sysfs "..../edac/<name>" */
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debugf1("%s() set name of kobject to: %s\n", __func__, edac_dev->name);
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err = kobject_set_name(&edac_dev->kobj, "%s", edac_dev->name);
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if (err)
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return err;
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err = kobject_register(&edac_dev->kobj);
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if (err) {
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debugf1("%s()Failed to register '.../edac/%s'\n",
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__func__, edac_dev->name);
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return err;
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}
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debugf1("%s() Registered '.../edac/%s' kobject\n",
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__func__, edac_dev->name);
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return 0;
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}
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/*
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* edac_device_unregister_main_kobj:
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* the '..../edac/<name>' kobject
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*/
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static void edac_device_unregister_main_kobj(struct edac_device_ctl_info
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*edac_dev)
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{
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debugf0("%s()\n", __func__);
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debugf1("%s() name of kobject is: %s\n",
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__func__, kobject_name(&edac_dev->kobj));
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init_completion(&edac_dev->kobj_complete);
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/*
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* Unregister the edac device's kobject and
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* wait for reference count to reach 0.
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*/
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kobject_unregister(&edac_dev->kobj);
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wait_for_completion(&edac_dev->kobj_complete);
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}
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/*************** edac_dev -> instance information ***********/
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/*
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* Set of low-level instance attribute show functions
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*/
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static ssize_t instance_ue_count_show(struct edac_device_instance *instance,
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char *data)
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{
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return sprintf(data, "%u\n", instance->counters.ue_count);
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}
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static ssize_t instance_ce_count_show(struct edac_device_instance *instance,
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char *data)
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{
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return sprintf(data, "%u\n", instance->counters.ce_count);
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}
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#define to_instance(k) container_of(k, struct edac_device_instance, kobj)
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#define to_instance_attr(a) container_of(a,struct instance_attribute,attr)
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/* DEVICE instance kobject release() function */
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static void edac_device_ctrl_instance_release(struct kobject *kobj)
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{
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struct edac_device_instance *instance;
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debugf1("%s()\n", __func__);
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instance = to_instance(kobj);
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complete(&instance->kobj_complete);
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}
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/* instance specific attribute structure */
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struct instance_attribute {
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struct attribute attr;
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ssize_t(*show) (struct edac_device_instance *, char *);
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ssize_t(*store) (struct edac_device_instance *, const char *, size_t);
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};
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/* Function to 'show' fields from the edac_dev 'instance' structure */
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static ssize_t edac_dev_instance_show(struct kobject *kobj,
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struct attribute *attr, char *buffer)
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{
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struct edac_device_instance *instance = to_instance(kobj);
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struct instance_attribute *instance_attr = to_instance_attr(attr);
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if (instance_attr->show)
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return instance_attr->show(instance, buffer);
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return -EIO;
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}
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/* Function to 'store' fields into the edac_dev 'instance' structure */
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static ssize_t edac_dev_instance_store(struct kobject *kobj,
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struct attribute *attr,
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const char *buffer, size_t count)
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{
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struct edac_device_instance *instance = to_instance(kobj);
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struct instance_attribute *instance_attr = to_instance_attr(attr);
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if (instance_attr->store)
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return instance_attr->store(instance, buffer, count);
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return -EIO;
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}
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/* edac_dev file operations for an 'instance' */
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static struct sysfs_ops device_instance_ops = {
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.show = edac_dev_instance_show,
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.store = edac_dev_instance_store
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};
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#define INSTANCE_ATTR(_name,_mode,_show,_store) \
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static struct instance_attribute attr_instance_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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};
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/*
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* Define attributes visible for the edac_device instance object
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* Each contains a pointer to a show and an optional set
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* function pointer that does the low level output/input
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*/
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INSTANCE_ATTR(ce_count, S_IRUGO, instance_ce_count_show, NULL);
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INSTANCE_ATTR(ue_count, S_IRUGO, instance_ue_count_show, NULL);
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/* list of edac_dev 'instance' attributes */
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static struct instance_attribute *device_instance_attr[] = {
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&attr_instance_ce_count,
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&attr_instance_ue_count,
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NULL,
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};
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/* The 'ktype' for each edac_dev 'instance' */
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static struct kobj_type ktype_instance_ctrl = {
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.release = edac_device_ctrl_instance_release,
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.sysfs_ops = &device_instance_ops,
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.default_attrs = (struct attribute **)device_instance_attr,
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};
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/*************** edac_dev -> instance -> block information *********/
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/*
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* Set of low-level block attribute show functions
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*/
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static ssize_t block_ue_count_show(struct edac_device_block *block, char *data)
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{
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return sprintf(data, "%u\n", block->counters.ue_count);
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}
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static ssize_t block_ce_count_show(struct edac_device_block *block, char *data)
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{
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return sprintf(data, "%u\n", block->counters.ce_count);
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}
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#define to_block(k) container_of(k, struct edac_device_block, kobj)
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#define to_block_attr(a) container_of(a,struct block_attribute,attr)
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/* DEVICE block kobject release() function */
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static void edac_device_ctrl_block_release(struct kobject *kobj)
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{
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struct edac_device_block *block;
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debugf1("%s()\n", __func__);
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block = to_block(kobj);
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complete(&block->kobj_complete);
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}
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/* block specific attribute structure */
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struct block_attribute {
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struct attribute attr;
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ssize_t(*show) (struct edac_device_block *, char *);
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ssize_t(*store) (struct edac_device_block *, const char *, size_t);
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};
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/* Function to 'show' fields from the edac_dev 'block' structure */
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static ssize_t edac_dev_block_show(struct kobject *kobj,
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struct attribute *attr, char *buffer)
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{
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struct edac_device_block *block = to_block(kobj);
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struct block_attribute *block_attr = to_block_attr(attr);
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if (block_attr->show)
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return block_attr->show(block, buffer);
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return -EIO;
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}
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/* Function to 'store' fields into the edac_dev 'block' structure */
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static ssize_t edac_dev_block_store(struct kobject *kobj,
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struct attribute *attr,
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const char *buffer, size_t count)
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{
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struct edac_device_block *block = to_block(kobj);
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struct block_attribute *block_attr = to_block_attr(attr);
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if (block_attr->store)
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return block_attr->store(block, buffer, count);
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return -EIO;
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}
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/* edac_dev file operations for a 'block' */
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static struct sysfs_ops device_block_ops = {
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.show = edac_dev_block_show,
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.store = edac_dev_block_store
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};
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#define BLOCK_ATTR(_name,_mode,_show,_store) \
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static struct block_attribute attr_block_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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};
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BLOCK_ATTR(ce_count, S_IRUGO, block_ce_count_show, NULL);
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BLOCK_ATTR(ue_count, S_IRUGO, block_ue_count_show, NULL);
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/* list of edac_dev 'block' attributes */
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static struct block_attribute *device_block_attr[] = {
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&attr_block_ce_count,
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&attr_block_ue_count,
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NULL,
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};
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/* The 'ktype' for each edac_dev 'block' */
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static struct kobj_type ktype_block_ctrl = {
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.release = edac_device_ctrl_block_release,
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.sysfs_ops = &device_block_ops,
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.default_attrs = (struct attribute **)device_block_attr,
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};
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/************** block ctor/dtor code ************/
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/*
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* edac_device_create_block
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*/
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static int edac_device_create_block(struct edac_device_ctl_info *edac_dev,
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struct edac_device_instance *instance,
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int idx)
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{
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int err;
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struct edac_device_block *block;
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block = &instance->blocks[idx];
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debugf1("%s() Instance '%s' block[%d] '%s'\n",
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__func__, instance->name, idx, block->name);
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/* init this block's kobject */
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memset(&block->kobj, 0, sizeof(struct kobject));
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block->kobj.parent = &instance->kobj;
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block->kobj.ktype = &ktype_block_ctrl;
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err = kobject_set_name(&block->kobj, "%s", block->name);
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if (err)
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return err;
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err = kobject_register(&block->kobj);
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if (err) {
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debugf1("%s()Failed to register instance '%s'\n",
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__func__, block->name);
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return err;
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}
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return 0;
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}
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/*
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* edac_device_delete_block(edac_dev,j);
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*/
|
|
static void edac_device_delete_block(struct edac_device_ctl_info *edac_dev,
|
|
struct edac_device_instance *instance,
|
|
int idx)
|
|
{
|
|
struct edac_device_block *block;
|
|
|
|
block = &instance->blocks[idx];
|
|
|
|
/* unregister this block's kobject */
|
|
init_completion(&block->kobj_complete);
|
|
kobject_unregister(&block->kobj);
|
|
wait_for_completion(&block->kobj_complete);
|
|
}
|
|
|
|
/************** instance ctor/dtor code ************/
|
|
|
|
/*
|
|
* edac_device_create_instance
|
|
* create just one instance of an edac_device 'instance'
|
|
*/
|
|
static int edac_device_create_instance(struct edac_device_ctl_info *edac_dev,
|
|
int idx)
|
|
{
|
|
int i, j;
|
|
int err;
|
|
struct edac_device_instance *instance;
|
|
|
|
instance = &edac_dev->instances[idx];
|
|
|
|
/* Init the instance's kobject */
|
|
memset(&instance->kobj, 0, sizeof(struct kobject));
|
|
|
|
/* set this new device under the edac_device main kobject */
|
|
instance->kobj.parent = &edac_dev->kobj;
|
|
instance->kobj.ktype = &ktype_instance_ctrl;
|
|
|
|
err = kobject_set_name(&instance->kobj, "%s", instance->name);
|
|
if (err)
|
|
return err;
|
|
|
|
err = kobject_register(&instance->kobj);
|
|
if (err != 0) {
|
|
debugf2("%s() Failed to register instance '%s'\n",
|
|
__func__, instance->name);
|
|
return err;
|
|
}
|
|
|
|
debugf1("%s() now register '%d' blocks for instance %d\n",
|
|
__func__, instance->nr_blocks, idx);
|
|
|
|
/* register all blocks of this instance */
|
|
for (i = 0; i < instance->nr_blocks; i++) {
|
|
err = edac_device_create_block(edac_dev, instance, i);
|
|
if (err) {
|
|
for (j = 0; j < i; j++) {
|
|
edac_device_delete_block(edac_dev, instance, j);
|
|
}
|
|
return err;
|
|
}
|
|
}
|
|
|
|
debugf1("%s() Registered instance %d '%s' kobject\n",
|
|
__func__, idx, instance->name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* edac_device_remove_instance
|
|
* remove an edac_device instance
|
|
*/
|
|
static void edac_device_delete_instance(struct edac_device_ctl_info *edac_dev,
|
|
int idx)
|
|
{
|
|
int i;
|
|
struct edac_device_instance *instance;
|
|
|
|
instance = &edac_dev->instances[idx];
|
|
|
|
/* unregister all blocks in this instance */
|
|
for (i = 0; i < instance->nr_blocks; i++) {
|
|
edac_device_delete_block(edac_dev, instance, i);
|
|
}
|
|
|
|
/* unregister this instance's kobject */
|
|
init_completion(&instance->kobj_complete);
|
|
kobject_unregister(&instance->kobj);
|
|
wait_for_completion(&instance->kobj_complete);
|
|
}
|
|
|
|
/*
|
|
* edac_device_create_instances
|
|
* create the first level of 'instances' for this device
|
|
* (ie 'cache' might have 'cache0', 'cache1', 'cache2', etc
|
|
*/
|
|
static int edac_device_create_instances(struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
int i, j;
|
|
int err;
|
|
|
|
debugf0("%s()\n", __func__);
|
|
|
|
/* iterate over creation of the instances */
|
|
for (i = 0; i < edac_dev->nr_instances; i++) {
|
|
err = edac_device_create_instance(edac_dev, i);
|
|
if (err) {
|
|
/* unwind previous instances on error */
|
|
for (j = 0; j < i; j++) {
|
|
edac_device_delete_instance(edac_dev, j);
|
|
}
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* edac_device_delete_instances(edac_dev);
|
|
* unregister all the kobjects of the instances
|
|
*/
|
|
static void edac_device_delete_instances(struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
int i;
|
|
|
|
/* iterate over creation of the instances */
|
|
for (i = 0; i < edac_dev->nr_instances; i++) {
|
|
edac_device_delete_instance(edac_dev, i);
|
|
}
|
|
}
|
|
|
|
/******************* edac_dev sysfs ctor/dtor code *************/
|
|
|
|
/*
|
|
* edac_device_add_sysfs_attributes
|
|
* add some attributes to this instance's main kobject
|
|
*/
|
|
static int edac_device_add_sysfs_attributes(
|
|
struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
int err;
|
|
struct edac_dev_sysfs_attribute *sysfs_attrib;
|
|
|
|
/* point to the start of the array and iterate over it
|
|
* adding each attribute listed to this mci instance's kobject
|
|
*/
|
|
sysfs_attrib = edac_dev->sysfs_attributes;
|
|
|
|
while (sysfs_attrib->attr.name != NULL) {
|
|
err = sysfs_create_file(&edac_dev->kobj,
|
|
(struct attribute*) sysfs_attrib);
|
|
if (err) {
|
|
return err;
|
|
}
|
|
|
|
sysfs_attrib++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* edac_device_create_sysfs() Constructor
|
|
*
|
|
* Create a new edac_device kobject instance,
|
|
*
|
|
* Return:
|
|
* 0 Success
|
|
* !0 Failure
|
|
*/
|
|
int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
int err;
|
|
struct kobject *edac_kobj = &edac_dev->kobj;
|
|
|
|
/* register this instance's main kobj with the edac class kobj */
|
|
err = edac_device_register_main_kobj(edac_dev);
|
|
if (err)
|
|
return err;
|
|
|
|
debugf0("%s() idx=%d\n", __func__, edac_dev->dev_idx);
|
|
|
|
/* If the low level driver requests some sysfs entries
|
|
* then go create them here
|
|
*/
|
|
if (edac_dev->sysfs_attributes != NULL) {
|
|
err = edac_device_add_sysfs_attributes(edac_dev);
|
|
if (err) {
|
|
debugf0("%s() failed to add sysfs attribs\n",
|
|
__func__);
|
|
goto err_unreg_object;
|
|
}
|
|
}
|
|
|
|
/* create a symlink from the edac device
|
|
* to the platform 'device' being used for this
|
|
*/
|
|
err = sysfs_create_link(edac_kobj,
|
|
&edac_dev->dev->kobj, EDAC_DEVICE_SYMLINK);
|
|
if (err) {
|
|
debugf0("%s() sysfs_create_link() returned err= %d\n",
|
|
__func__, err);
|
|
goto err_unreg_object;
|
|
}
|
|
|
|
debugf0("%s() calling create-instances, idx=%d\n",
|
|
__func__, edac_dev->dev_idx);
|
|
|
|
/* Create the first level instance directories */
|
|
err = edac_device_create_instances(edac_dev);
|
|
if (err) {
|
|
goto err_remove_link;
|
|
}
|
|
|
|
return 0;
|
|
|
|
/* Error unwind stack */
|
|
err_remove_link:
|
|
/* remove the sym link */
|
|
sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK);
|
|
|
|
err_unreg_object:
|
|
edac_device_unregister_main_kobj(edac_dev);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* edac_device_remove_sysfs() destructor
|
|
*
|
|
* remove a edac_device instance
|
|
*/
|
|
void edac_device_remove_sysfs(struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
debugf0("%s()\n", __func__);
|
|
|
|
edac_device_delete_instances(edac_dev);
|
|
|
|
/* remove the sym link */
|
|
sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK);
|
|
|
|
/* unregister the instance's main kobj */
|
|
edac_device_unregister_main_kobj(edac_dev);
|
|
}
|